HAPLN4 (Hyaluronan And Proteoglycan Link Protein 4) is a Protein Coding gene. Among its related pathways are Phospholipase-C Pathway and ERK Signaling. GO annotations related to this gene include extracellular matrix structural constituent and hyaluronic acid binding. An important paralog of this gene is HAPLN1. Binds to hyaluronic acid and may be involved in formation of the extracellular matrix.